The move comes a week after now-former officer Kenneth Nieves was placed on paid administrative leave pending the results of an internal investigation. The action was taken after undisclosed information was brought to the attention of the department.

In a written statement released Friday, Fusaro hinted at the possibility of a criminal investigation.

“In light of Nieves’ resignation, the employee disciplinary process is no longer applicable and has ended,” Fusaro said in the statement.

“To ensure the necessary separation of the administrative investigation and any potential criminal proceedings, appropriate information has been forwarded to the Office of the New London County State’s Attorney,” Fusaro said.

Fusaro declined any further comment.

Nieves had worked at the department since 2002. Nieves and a representative from the Norwich police union could not be reached Friday for comment.